I live in OC and the market was hot enough when I was flipping starting about 2008 for 6 or 7 years. Not SF or Portland hot but people spent $$ on vintage steel bikes. Buy the bike for $100, put a few $ in consumables on it, tune up, sell for $250. I sold a few hundred bikes to fund the habit. I don't know know what the virus has done to the vintage bike market but it was soft before it hit. From what I hear people are buying new bikes to get out and exercise but mostly the $4-$500 hybrid junk.

I see your ad with the one photo. You MUST take drive side photos and details of the bike. Regular civilians may not care but people like us have to see the details. I want to know if the crank is covered in grease or if it looks pristine. There are probably a hundred threads here on how to do that. You may have to adjust your expectations on what $$ amount it will sell for. The number of humans tall enough to ride it and want that particular bike are just not that many. Best of luck.